Our 3 patients with simultaneously-occurring hypernephromas treated with simultaneously-directed surgical therapy on both kidneys are described. One patient died with residual neoplasm 2 1/2 years postoperatively, while the other 2 patients are alive and presumably free of tumor 60 and 22 months postoperatively.

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We report a case of seminoma associated with crossed fused renal ectopia and a duplicated vena cava. The impact of these congenital anomalies on the treatment of testicular seminoma is discussed.